Sponge bath mat



FIG. 1 is a top plan view of a "sponge bath mat" showing my new design;

FIG. 2 is a bottom plan view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof; and,

FIG. 5 is a left side elevational view thereof, the right side elevation being a mirror image thereof. 

The ornamental design for a sponge bath mat, as shown and described. 